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Everyone should learn something about first aid, for every second will_______in an emergency.
A. playB.countC. happenD. show
B

试题分析:句意,每个人都应该学习一些有关急救的知识,因为在紧急情况下每一秒都很有价值。Play玩 count有价值 happen 发生 show演示,根据语意选B项。
点评:解答这类题目,关键是理解题干意思以及各选项词汇的意思,可以像数学中的代入法一样,依次把各个选项意思放入句子中进行比较,不难选出正确答案。
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